WOLFRAM SYSTEM MODELER
PilotOperatedSequenceValvePressure valve, controlled by the pressure at the port_pilot |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Hydraulic.Valves.PressureControl.PilotOperatedSequenceValve"]
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Information
This is a model of a pilot-operated sequence valve with lumped volumes. If the pressure at the pilot port is higher than pMin, the valve starts to open. When the pressure reaches pMax, the valve is fully open. The spool model has first-order dynamics with time constant t1.
Implementation
This valve basically consists of an orifice controlled by a spool.Reference
Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 292.Parameters (8)
| medium |
Value: Oil() Type: Medium Description: Medium in the component |
|---|---|
| V |
Value: 0.0001 Type: Volume (m³) Description: Volume of control valve |
| Gleak |
Value: 9.999999999999999e-21 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between ports |
| pMax |
Value: 21000000.0 Type: Pressure (Pa) Description: Pressure when valve is fully opened |
| pMin |
Value: 20000000.0 Type: Pressure (Pa) Description: Pressure when valve starts to open |
| t1 |
Value: 0.01 Type: Time (s) Description: Time constant for first-order system |
| AMax |
Value: 0.001 Type: Area (m²) Description: Maximum opening area |
| Cd |
Value: 0.62 Type: Real Description: Coefficient of discharge for the opening |
Connectors (3)
Components (5)
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medium |
Type: Medium Description: Medium in the component |
|---|---|---|
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pressureCompensatingValve |
Type: PressureCompensatingValveNormallyClosed Description: Static pressure compensating valve |
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volume_a |
Type: Volume Description: Fixed volume with fluid storage |
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volume_b |
Type: Volume Description: Fixed volume with fluid storage |
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tank1 |
Type: Tank Description: Simple tank with constant pressure |
Used in Examples (1)
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Hydraulic.Examples.MultipleActuators Example circuit with two cylinders working in a sequence |